Improvement in base-burning stoves



2 Sheets `Sheet 1.

J. SPEAR.

Base Burning Stove.

Pat'ented luiy 7, 1868.

lllfl illflllllll N. PETERS. Pham-uxhugnphef, wnmngeon. n. c.

2 YSheefs--Sheet 2;

1. SPEAR.

` Base Burning Stve.

y No. 79.696. Patented Julyv 7, 1868.

JAMES SPEAR, OF'PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN BASE-BURNING STOVES.

Specification forming part of Letters Patent No. 79,6969 dated July7,1868.

To all whom it may concern:

Be it known that I, JAMEs SPEAR, of 1116 Market street, inthe city andcounty of Phil-` adelphia'and State of Pennsylvania, `have inventedcertain new and useful Improvements in Stoves 5 and I do hereby declarethe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon.

The nature of my invention consists in a new mode of dumping a revolvingor shaking grate, so that no dust can escape from the stove whileperforming the operation of dumping or raking; and also in the manner ofconstructing the reservoir and attaching it to the crown-top of thestove; and also in the construction and general combination andarrangement of the several parts Vof the stove.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

Figure l is a general section through the stove. Fig. 2 is a view of thereservoir in detached parts before it is put together.' Fig. 3 is a viewof the interior and stationary illuminating section. Fig. 4. is a viewof the exterior and revolving section with mica win' dows attached. Fig.5 is a plan of the revolving and dumping grate. Fig. 6 is a plan of thepivot-bar with dumping lever and rod attached. Fig. 7 is the uppersection of the stove, showing inlet at register for air, and guard roundthe chimneypipe. Fig. 8 is a View of the hinged urn. Fig. 9 is a frontView of the slot in the base closed by a door, through which the gratecan be shaken. Fig. 10 is a perspective view of the mica windows. Fig.ll is another mode of dumping the grate on the same principle.

I form the base A square. The bottom plate,

al, is of castiron, the sides a2 of the base are of sheet-iron, with acast-iron door-frame, a3, in which is tted the door opening to theashdrawer c4, and also the slot o for raking the grate. The top part ofthe base a5 is of castiron. The outer casing, b', or cylinder of theiire-pot is round, and is composed of sheetiron lined with tire-brick B.This tire-pot fits in close contact with the case b. The cylinder b isin the shape of an inverted cone, the smaller end resting on thecast-iron base-plate I a5. Above the cylinder or fire-pot I place around cast-iron section, C, slightly conical in form, with openings clfor the exit of light, and supplied with a movable exterior casing, I),of Acast-iron, having similar openings c2, upon which openings arefitted the cast-iron frames Z2 with mica windows di. These frames aresecured to the casing D by the projecting clips d4 at the bottom, and atthe top by the hooks d3, which are cast upon the frame, and become apermanent part of it, and by this plan I dispense with the turn-bucklein common use, and save Atime and labor in construction. The mica isfastened to the windowframe d2 by staples d5, Fig. l0, cast on theframe, which are passed through the mica, and secured by a pin. Thisouter case, D, with its windows is capable of being revolved orregistered, so that the mica windows can be closed while the iire isbeing kindled, and opened after it is ignited, thus preventing thesmoking of the mica, which is such a common occurrence in all otherstoves. Above these mica windows I place a section of sheet-iron, G,supplied with a register, H, in front, for the purpose of cooling thefire 5 and above this sheet-iron section I place a crown-top, K, ofcast-iron, supplied with an urn, M, hinged thereto, as shown, Fig. 8. Aguard, g', is placed round the entrance to the chimney, so as to throwthe heat more round the upper portion of the stove. Within the stove Iplace a reservoir, N, for a supply of fuel to the fire-pot B. Thisreservoir is made in three sections, joined together. The lower end, nl,near the tire, is of cast-iron, the middle section, a2, is ofsheet-iron, and the upper section, nl, is of cast iron. This uppersection is cast with three arms or lugs, n4, which rest on three pro-`jections, a5, (see Fig. 7,) cast on the lower part of the crown-top,and is supported by them. Above this section is a small cast-ironfunnel, n, that connects in close contact with the outer top, K. By thismode of constructing the reservoir it can be made much lighter fortransportation, and at the same time be as durable as a cast-ironreservoir. The outer top, K, is secured to the under section, K, by thebolts p, and by simply taking oft the top plate, K', the reservoir canbe easily removed. The urn M is hinged to the outer top by screw orpivot o, and its base forms a cover to the reservoir IT, thus completingthe top ot the stove, the

or pivot bar T. A tongue, V, (see Fig. 9,) cast on, projects downward infront, into which a handle is inserted through the slot n', whenever itis necessary to give the grate the shaking reciprocating motion commonto revolving grates. The pivot-bar T is pivoted at each end in thegrate-wall It. This bar is made with a lever, r', cast on it, andjointed at the end to the rod t1, which rod passes through a closeitting hole in the base A. This pivot-bar also has two arms, w, one on eachside, which serve to steady the grate in its horizontal position, andalso act as bearings against the under side ot' the grate inthe dumpingprocess, thus releasing the center-pin s from strain. The pivot-bar T isheld in position by an arm, w1, caston the said bar, and extendingnearly to the grate-rest It, and resting on the lug 202, cast upon thegrate-rest. By this device itis only necessary to pull the rod t1, andthe grate S can be dumped without any opening being` made in the stovefor the escape of dust. By extending 011e ot' the pivots t2 through thebase, and attaching a lever, r2, outside, as shown, Fig. 11, the sameObjectis accomplished, as I do with the interior rod and lever. Ineither case the grate s can be dumped Without opening the base of thestove.

I do not simply claim dumping a grate by means ot' a lever attached tothe journal of an ordinary grate; nor do I claim simply a lever attachedto a grate inside of a stove, and operated by a rod extending throughthe grate; nor do I claim an internal reservoir, or the revolvin g andilluminating sections C D, except when constructed and combined asdescribed.

lVhat I claim as my invention, and wish to secure by Letters Patent, is

l. The revolving grate S, in combination with the dumping apparatus,consisting ofthe pivot-bar T, arms W W, lever 1", rod t1, so constructedthat it can be dumped without opening the stove.

2. The reservoir N, constructed with a lower cast-iron ring, al,sheet-iron section a2, upper cast-iron rings, a3 a6, so connected as toform a reservoir, for the purpose shown and described.

3. The register H, for the purpose of admitting air between the outersection, G, and reservoir N, in combination with the revolving windowscl2, arranged and operating substantially as shown and described.

4. The combination and arrangement of the revolving and dumping grate Swith the lirepot B, revolving windows d2, reservoir N, register H, andswinging urn M, substantially as described.

JAMES SPEAP.

Witnesses:

CRAWFORD SPEAK, Jos. S. HrBBs.

